#!/usr/bin/perl -w

use strict;
use File::Find;
use File::Path;
use File::Basename;

=head1 NAME

buildtests -- generate test scripts from inline tests in Perl scripts

=head1 SYNOPSIS

    buildtests output-test-dir

=head1 DESCRIPTION

This script goes through the files to be installed by an e-smith RPM,
seeking out Perl scripts which contain embedded tests (using
Test::Inline).  If it finds them, it generates tests under
F</etc/e-smith/tests/output-test-dir>

The filenames of the output test files are usually in the form
F<embedded-origname.t> -- the leading directories will be stripped off,
and the suffix will be stripped off if it's either of F<.pm> or F<.pl>.
However, there's a possibility that this will result in a name clash, so
if a name clash looks likely to occur, the script will keep prefixing
leading directories to the output filename until it finds something
that's not taken.  So if you already had, for example, a test script
called F<embedded-config.t> and you wanted to generate a test from
esmith::config, it would end up being called
F<embedded-esmith-config.t>.  In short: the filenames given to the
output files may vary from time to time, but the files will not overwrite 
existing files.

=cut

my $outputdir = $ARGV[0] || usage();

print "Building test suite from embedded tests...\n";

die "You must start buildtests in the directory which contains the root/ tree\n"
    unless -d "root";

$outputdir = "root/etc/e-smith/tests/$outputdir";
unless (-d $outputdir) {
    print "  creating directory $outputdir...\n";
    mkpath $outputdir or die "Can't make output directory $outputdir: $!";
}

find({ wanted => \&buildtests, no_chdir => 1 }, "root/");

sub buildtests {
    return unless -T;
    return if /CVS/;
    return if /\.t$/;
    return if /\.orig$/;
    my $origfile = $_;
    my ($testname, $dir) = fileparse($origfile, ".pm", ".pl");
    my @dirs = split "/", $dir;

    while (-f "$outputdir/embedded-$testname.t") {
        $testname = pop(@dirs) . "-$testname";
    }

    my $testfile = "$outputdir/embedded-$testname.t";

    #print "ORIG: $origfile\nTEST: $testfile\n";
    system("pod2test", $origfile, $testfile);
}


sub usage {
    die qq(
Usage:
    buildtests output-test-dir

You must provide an output directory name, which will be created under
/etc/e-smith/tests.  
);
}